Hanna Instruments HI 758 - User Manual

Marine Calcium
Dear Customer,
Thank you for choosing a Hanna Instruments Product.
Please read this instruction manual carefully before using the instrument. If you need
additional technical information, do not hesitate to e-mail us at tech@hannainst.com.
Preliminary examination:
Please examine this product carefully. Make sure that the instrument is not damaged. If
any damage occurred during shipment, please notify your Dealer.
Each HI 758 meter is supplied complete with:
• Two Sample Cuvettes and Caps
• Reagents for 25 tests
• Droper
• 2 x 1 mL syringes with tips
• 1 x 1.5V AAA Battery
• Instruction Manual
HI 758
Functional description:
Errors and warnings:
Light High: There is too much light to perform a measurement.
Please check the preparation of the zero cuvette.
Light Low: There is not enough light to perform a measurement.
Please check the preparation of the zero cuvette.
Inverted cuvettes: The sample and the zero cuvette are inverted.
Under range: A blinking “200” indicates that the reading is under
range.
Over Range: A blinking value of the maximum concentration indicates
the reading is over range. Dilute the sample and re-run the test.
Battery low: The battery must be replaced soon.
Dead battery: This indicates that the battery is dead and must be
replaced. Once this indication is displayed, normal operation of the
instrument will be interrupted. Change the battery and restart the
meter.
1. Cuvette cap.
2. Cuvette with cap.
3. Cuvette holder.
4. Liquid Crystal Display.
5. Button
For more details about spare parts and accessories
see “Accessories”.
www.hannainst.com
Technical specifications:
Range 200 to 600 ppm
Resolution 1 ppm
Accuracy ±6 % of reading @ 25 °C / 77 °F
Light Source Light Emitting Diode @ 610 nm
Light Detector Silicon Photocell
Method Adaptation of the zincon method.
Environment 0 to 50 °C (32 to 122 °F);
max 95% RH non-condensing
Battery Type 1 x 1.5V AAA
Auto-Shut off After 10 minutes of non-use
Dimensions 81.5 x 61 x 37.5 mm (3.2 x 2.4 x 1.5”)
Weight 64 g (2.25 oz.)

Hanna Instruments HI 758 Specifications

General

Light Source	LED @ 610 nm
Light Detector	Silicon Photocell
Environment	0 to 50°C (32 to 122°F); RH max 95% non-condensing
Auto-shut off	After 10 minutes of non-use
Auto Power Off	Yes
Temperature Compensation	Automatic
Method	Adaptation of the Zincon method
Battery Type	1.5V AAA
Weight	64 g

Summary

Errors and Warnings

Light High Error

Indicates too much light for measurement; check zero cuvette preparation.

Light Low Error

Indicates insufficient light for measurement; check zero cuvette preparation.

Inverted Cuvettes

Warning that sample and zero cuvettes may be inverted.

Under Range Reading

Blinking '200' signifies measurement is below the set range.

Over Range Reading

Blinking maximum value means reading exceeds range; dilute sample.

Battery Low Indicator

Alerts user that the battery charge is low and requires replacement.

Dead Battery Indicator

Indicates battery is depleted; instrument operation is interrupted.

Battery Management

Automatic Shut-off

Instrument powers down after 10 minutes of inactivity to conserve battery.

Battery Replacement Procedure

Procedure to turn off, open cover, replace battery, and secure cover.